Asking for Gifts for a Second Marriage

My son's first marriage lasted three years. When it ended, his ex took the wedding gifts from her family and he kept the gifts from ours. Now he's remarrying, and it's his bride's first wedding. Is it appropriate to ask her friends and family for gifts, but not our family?

It's OK for guests to withhold wedding gifts when someone is getting married for the second (or third, or fourth) time.

P.S. Friends and family of a second-time groom aren't required to give a gift because, presumably, they gave one at his first wedding. Of course, the bride's clan will likely want to give presents, since she hasn't been married before. To let your relatives off the hook, it's fine to tell them verbally that they're not expected to give again, though some may choose to do so anyway, to show their happiness for the couple.